johnsmachines

machines which I have made, am making, or intend to make, and some other stuff. If you find this site interesting, please leave a comment. I read every comment and respond to most. n.b. There is a list of my first 800 posts in my post of 17 June 2021, titled "800 Posts"

Burrell Traction Engine

Castings for Burrell steam traction engine.

Castings for Burrell steam traction engine.

IMG_1958 IMG_1959 IMG_1960 IMG_1961 IMG_1962

Collet chuck for CNC lathe

IMG_1953

I made this ER32 collet chuck for my Boxford CNC lathe.  Actually I made 2 chucks, but the first one had 0.03mm runout, so I made this second one more carefully, and it has no measureable runout at all, at the chuck or 50mm out from the face. The material is stainless steel, so it was difficult to drill the holes and tap the threads, and I used a few tungsten carbide inserts.  I am very happy with the end result. Thanks to Stuart T for the design.

I made this ER32 collet chuck for my Boxford CNC lathe. Actually I made 2 chucks, but the first one had 0.03mm runout, so I made this second one more carefully, and it has no measureable runout at all, at the chuck or 50mm out from the face.
The material is stainless steel, so it was difficult to drill the holes and tap the threads, and I used a few tungsten carbide inserts. I am very happy with the end result.
Thanks to Stuart T for the design.